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ADI LT3092IST 200mA 2-Terminal Programmable Current Source

Shenzhen Mingjiada Electronics Co., Ltd. as a world-renowned electronic components authorised independent distributor, specializing in the supply of ADI high-performance LT3092IST 200mA 2-terminal programmable current source chip.

ADI LT3092IST Programmable Current Source Product Details

The LT3092IST is a programmable 2-terminal current source. It requires only two resistors to set the output current from 0.5mA to 200mA. A variety of analogue techniques are available to actively program the output current. the LT3092IST is stable without input and output capacitors and offers high DC and AC impedance. This feature allows operation in intrinsically safe applications.

The SET pin offers 1% initial accuracy and low temperature coefficient. Current regulation is better than 10ppm/V over the 1.5V to 40V range.

The LT3092IST operates in a 2-terminal current source configuration in series with the signal line. It is ideal for driving sensors, remote power supplies, and as a precision current limiter for local power supplies.

KEY FEATURES AND TECHNOLOGICAL INNOVATIONS

The LT3092IST integrates a number of advanced technologies that set it apart from other products in its class:

Wide Range Programmable Current Outputs: Two external resistors are all that is needed to set the output current range from 0.5mA to 200mA, making the design flexible and easy to use.

Outstanding Current Accuracy: The SET pin provides 1% initial accuracy and low temperature coefficients to ensure that the current outputs are stable and reliable. Reliability

Excellent line regulation performance: in the 1.5V to 40V input range, the current regulation is better than 10ppm/V, which significantly reduces the impact of voltage fluctuations on the output

Wide Input Voltage Range: supports 1.2V to 40V input voltage, adaptable to a wide range of power supply environments

Simplified Design: Stable operation without the need for input and output capacitors, reducing the number of external components and PCB area

High Impedance Characteristics: High impedance characteristics: High DC and AC impedance, especially suitable for intrinsically safe applications.

Advanced Protection Functions

The LT3092IST has built-in multiple protection mechanisms, which greatly improves the reliability and safety of the system:

Reverse Voltage Protection: Prevents damage to the device due to the reversal of power supply.

Reverse Current Protection: Avoids faults caused by reverse current flow under abnormal working conditions.

Current Limit: Automatically limits the maximum output current to protect the load and the device itself. device itself

Thermal shutdown protection: automatically shuts down the output when the temperature exceeds the safety threshold to prevent overheating damage

Typical application scenarios of the LT3092IST

The ADI LT3092IST programmable current source plays a key role in many industrial, automotive, and consumer electronics fields due to its high accuracy, high reliability, and design flexibility.

Sensor Driving and Signal Conditioning

In industrial sensors and environmental monitoring equipment, LT3092IST performs well as a precision current source:

Temperature Sensors: Provide stable excitation current for RTDs and thermocouples to ensure the accuracy of temperature measurements

Pressure Sensors: Drive MEMS pressure sensors for high-resolution pressure monitoring

Photodetectors: Provide a constant current for the photosensitive element to improve the detection of optical signals Signal-to-noise ratio of optical signal detection

4-20mA transmitter: builds the core current source of two-wire industrial transmitters to achieve the remote transmission of process variables

Power management and distribution system

LT3092IST has unique advantages as a precision current limiter and distributed power supply in power supply systems:

Intrinsically safe circuit: utilizes its high impedance characteristics for intrinsically safe equipment in hazardous environments

LED driver: provides constant current for LED strings to ensure the brightness of the LEDs. LED drivers: Provide constant current to LED strings to ensure consistent brightness and long life

Remote power supply: Power remote devices over long cables, with current source characteristics compensating for line voltage drop

Power redundancy system: Even out current flow in multiple parallel applications to improve system reliability

Test Measurement & Instrumentation

In precision test equipment, the LT3092IST provides a highly stable current reference:

Semiconductor tester: Provides a programmable excitation current calibration source for device testing. Semiconductor Testers: Providing programmable excitation current for device testing

Calibration Sources: Acting as a secondary standard current source for instrument calibration

Data Acquisition Systems: Providing accurate bias currents for analogue front-ends to improve measurement accuracy

Laboratory Power Supplies: Building programmable current source modules for R&D testing needs

Automotive Electronics and Communications Equipment

The LT3092IST's wide temperature range (-40°C to +125°C) and high reliability make it suitable for harsh environments In-vehicle sensors: for TPMS, position sensors, and other automotive electronics systems

Communication base stations: to provide bias current for RF modules to ensure signal quality

Networking equipment: as a current limiter in power management circuits for routers and switches

5G infrastructure: to support the power requirements of 5G small base stations and optical modules